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17 results for “North American passerines”
Bird plumage brightness scores and blood parasite prevalence values of North American passerine species
<p>Dataset with bird plumage brightness scores and blood parasite prevalence values for 114 North American passerine host species. One file contains the data table. One file contains a table with descriptions of the columns in the data table.</p> <p>Note: These data were reconstructed from files used in Read & Harvey 1989 (<a href="https://doi.org/10.1038/339618a0">https://doi.org/10.1038/339618a0</a>) with column headings inferred with the help of Read 1991 (<a href="https://doi.org/10.1086/285225">https://doi.org/10.1086/285225</a>).</p>
Interspecific territoriality has facilitated recent increases in the breeding habitat overlap of North American passerines
<p>As species' ranges shift in response to human-induced global changes, species interactions are expected to play a large role in shaping the resultant range dynamics and, subsequently, the composition of modified species assemblages. Most research on the impact of species interactions on range dynamics focuses on the effects of trophic interactions and exploitative competition for resources, but an emerging body of work shows that interspecific competition for territories and mates also affects species range shifts. As such, it is paramount to build a strong understanding of how these forms of behavioural interference between species impact landscape-scale patterns. Here, we examine recent (1997–2019) range dynamics of North American passerines to test the hypothesis that behavioural interference impacts the ease with which species move across landscapes. Over this 22-year period, we found that fine-scale spatial overlap between species (syntopy) increased more for species pairs that engage in interspecific territoriality than for those that do not. We found no evidence, however, for an effect of reproductive interference (hybridisation) on syntopy, and no effect of either type of interference on range-wide overlap (sympatry). Examining the net effects of species interactions on continent-scale range shifts may require species occurrence data spanning longer time periods than are currently available for North American passerines, but our results show that interspecific territoriality has had an overall stabilising influence on species coexistence over the past two decades.</p>
Interspecific territoriality has facilitated recent increases in the breeding habitat overlap of North American passerines
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FIGURES 41–44 in Systematics of the genus Syringophilopsis Kethley, 1970 (Acari: Prostigmata: Syringophilidae) with description of three new species from North American passerines
FIGURES 41–44. Syringophilopsis passerinae (Clark, 1964). Female. 41. Hypostomal apex. 42. Longitudinal branch of peritreme. 43. Hysteronotal region of bases of setae d1. 44. Fan-like seta p' of leg III. Scale bars: 41, 42, 44 = 20 µm; 43 = 50 µm.
FIGURES 27, 28 in Systematics of the genus Syringophilopsis Kethley, 1970 (Acari: Prostigmata: Syringophilidae) with description of three new species from North American passerines
FIGURES 27, 28. Syringophilopsis sturnellus sp. nov. Male. 27. Dorsal view. 28. Ventral view of gnathosoma and propodosoma.
FIGURES 17–24 in Systematics of the genus Syringophilopsis Kethley, 1970 (Acari: Prostigmata: Syringophilidae) with description of three new species from North American passerines
FIGURES 17–24. Syringophilopsis sittae sp. nov. Female. 17. Hypostomal apex. 18. Peritreme. 19. Hysteronotal shield. 20. Fan-like seta p' of leg III. Male. 21. Hypostomal apex. 22. Peritreme. 23. Fan-like seta p' of leg III. 24. Genito-anal region. Scale bars: 17, 18, 20–23 = 20 µm; 19, 24 = 50 µm.
FIGURES 5–12 in Systematics of the genus Syringophilopsis Kethley, 1970 (Acari: Prostigmata: Syringophilidae) with description of three new species from North American passerines
FIGURES 5–12. Syringophilopsis certhiae sp. nov. Female. 5. Hypostomal apex. 6. Peritreme. 7. Hysteronotal shield. 8. Fanlike seta p' of leg III. Male. 9. Hypostomal apex. 10. Peritreme. 11. Fan-like seta p' of leg III. 12. Genito-anal region. Scale bars: 5, 6, 8–12 = 20 µm; 7 = 50 µm.
FIGURES 39, 40 in Systematics of the genus Syringophilopsis Kethley, 1970 (Acari: Prostigmata: Syringophilidae) with description of three new species from North American passerines
FIGURES 39, 40. Syringophilopsis passerinae (Clark, 1964). Female. 39. Dorsal view. 40. Ventral view.
FIGURES 29–38 in Systematics of the genus Syringophilopsis Kethley, 1970 (Acari: Prostigmata: Syringophilidae) with description of three new species from North American passerines
FIGURES 29–38. Syringophilopsis sturnellus sp. nov. (Figs 29–36). Female. 29. Hypostomal apex. 30. Longitudinal branch of peritreme. 31. Pygidial shield. 32. Fan-like seta p' of leg III. Male. 33. Hypostomal apex. 34. Peritreme. 35. Fan-like seta p' of leg III. 36. Genito-anal region. Syringophilopsis icteri Bochkov & Galloway, 2001 (Figs. 37, 38). Female. 37. Propodonotal shield. 38. Pygidial shield. Scale bars: 29, 30, 32–35 = 20 µm; 31, 36–38 = 50 µm.
Evolution of winter moulting strategies in European and North American migratory passerines
<p>Moult is critical for birds as it replaces damaged feathers and worn plumage, enhancing flight performance, thermoregulation, and communication. In passerines, moult generally occurs on the breeding grounds during the post-breeding period once a year. However, some species of migrant passerines that breed in the Nearctic and western Palearctic regions have evolved different moulting strategies that involve moulting on the overwintering grounds. Some species forego moult on the breeding grounds and instead complete their prebasic moult on the overwintering grounds. Other species moult some or all feathers a second time (prealternate moult) during the overwintering period. Using phylogenetic analyses, we explored the po<span>tential drivers of the evolution of winter moults in Nearctic and western Palearctic breeding passerines. Our results indicate an association between longer photoperiods and the presence of prebasic and prealternate moults on the overwintering grounds for both Nearctic and western Palearctic species. We also found a relationship between prealternate moult and </span><span><span>generalist and water</span></span><span> habitats for western Palearctic species. Finally, the complete prealternate moult in western Palearctic passerines was linked to longer days on the overwintering grounds and longer migration distance. Longer days may favour the evolution of winter prebasic moult by increasing </span><span><span>the time window when birds can absorb essential nutrients</span></span><span> for moult. Alternatively, for birds undertaking a prealternate moult at the end of the overwintering period, longer days may increase exposure to feather-degrading ultra-violet radiation, necessitating the replacement of feathers. Our study underlines the importance of the overwintering grounds in the critical process of moult for many passerines that breed in th</span>e Nearctic and western Palearctic regions.</p>
Evolution of winter moulting strategies in European and North American migratory passerines
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Evolution of moult-migration is directly linked to aridity of the breeding grounds in North American passerines
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FIGURES 15, 16 in Systematics of the genus Syringophilopsis Kethley, 1970 (Acari: Prostigmata: Syringophilidae) with description of three new species from North American passerines
FIGURES 15, 16. Syringophilopsis sittae sp. nov. Male. 15. Dorsal view. 16. Ventral view.
FIGURES 1, 2 in Systematics of the genus Syringophilopsis Kethley, 1970 (Acari: Prostigmata: Syringophilidae) with description of three new species from North American passerines
FIGURES 1, 2. Syringophilopsis certhiae sp. nov. Female. 1. Dorsal view. 2. Ventral view.
FIGURES 3, 4 in Systematics of the genus Syringophilopsis Kethley, 1970 (Acari: Prostigmata: Syringophilidae) with description of three new species from North American passerines
FIGURES 3, 4. Syringophilopsis certhiae sp. nov. Male. 3. Dorsal view. 4. Ventral view.
FIGURES 25, 26 in Systematics of the genus Syringophilopsis Kethley, 1970 (Acari: Prostigmata: Syringophilidae) with description of three new species from North American passerines
FIGURES 25, 26. Syringophilopsis sturnellus sp. nov. Female. 25. Dorsal view. 26. Ventral view.
FIGURES 13, 14 in Systematics of the genus Syringophilopsis Kethley, 1970 (Acari: Prostigmata: Syringophilidae) with description of three new species from North American passerines
FIGURES 13, 14. Syringophilopsis sittae sp. nov. Female. 13. Dorsal view. 14. Ventral view.
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Allen Brain Atlas
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OpenNeuro
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